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Close but #1071...

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This commit is contained in:
Eric Andersen
2000-12-06 23:17:37 +00:00
parent bfa54143f6
commit bc5941a540
2 changed files with 28 additions and 34 deletions
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31
init.c
View File

@@ -288,30 +288,27 @@ void set_term(int fd)
tcsetattr(fd, TCSANOW, &tty);
}
/* How much memory does this machine have? */
/* How much memory does this machine have?
Units are kBytes to avoid overflow on 4GB machines */
static int check_free_memory()
{
struct sysinfo info;
unsigned int result, u, s=10;
/* Pre initialize mem_unit in case this kernel is something prior to
* the linux 2.4 kernel (which will actually fill in mem_unit... */
sysinfo(&info);
if (sysinfo(&info) != 0) {
printf("Error checking free memory: %s\n", strerror(errno));
perrorMsg("Error checking free memory: ");
return -1;
}
/* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
if (info.mem_unit==0) {
info.mem_unit=1;
}
info.mem_unit*=1024;
/* Note: These values can in theory overflow a 32 bit unsigned long (i.e.
* mem >= Gib), but who puts more then 4GiB ram+swap on an embedded
* system? */
info.totalram/=info.mem_unit;
info.totalswap/=info.mem_unit;
return(info.totalram+info.totalswap);
/* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
* Kernels 2.4.0 return info.mem_unit in bytes. */
u = info.mem_unit;
if (u==0) u=1;
while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
result = (info.totalram>>s) + (info.totalswap>>s);
result = result*u;
if (result < 0) result = INT_MAX;
return result;
}
static void console_init()

31
init/init.c
View File

@@ -288,30 +288,27 @@ void set_term(int fd)
tcsetattr(fd, TCSANOW, &tty);
}
/* How much memory does this machine have? */
/* How much memory does this machine have?
Units are kBytes to avoid overflow on 4GB machines */
static int check_free_memory()
{
struct sysinfo info;
unsigned int result, u, s=10;
/* Pre initialize mem_unit in case this kernel is something prior to
* the linux 2.4 kernel (which will actually fill in mem_unit... */
sysinfo(&info);
if (sysinfo(&info) != 0) {
printf("Error checking free memory: %s\n", strerror(errno));
perrorMsg("Error checking free memory: ");
return -1;
}
/* Kernels prior to 2.4.x will return info.mem_unit==0, so cope... */
if (info.mem_unit==0) {
info.mem_unit=1;
}
info.mem_unit*=1024;
/* Note: These values can in theory overflow a 32 bit unsigned long (i.e.
* mem >= Gib), but who puts more then 4GiB ram+swap on an embedded
* system? */
info.totalram/=info.mem_unit;
info.totalswap/=info.mem_unit;
return(info.totalram+info.totalswap);
/* Kernels 2.0.x and 2.2.x return info.mem_unit==0 with values in bytes.
* Kernels 2.4.0 return info.mem_unit in bytes. */
u = info.mem_unit;
if (u==0) u=1;
while ( (u&1) == 0 && s > 0 ) { u>>=1; s--; }
result = (info.totalram>>s) + (info.totalswap>>s);
result = result*u;
if (result < 0) result = INT_MAX;
return result;
}
static void console_init()